变桨距风电机组最佳叶尖速比的拟合求取

Optimal blade tip speed ratio fitting of variable-pitch wind turbines

根据风力机数学模型,分析最大风能捕获的运行点条件,推导最佳叶尖速比的计算表达式.运用曲线拟合方法拟合得到误差数据条件下的最佳叶尖速比的参数,间接计算得到最佳叶尖速比.算例显示拟合值准确度较高.研究工作为计算风电机组最佳叶尖速比提供新的曲线拟合方法.

Based on the wind turbine mathematical model,the expression of the optimal blade tip speed ratio was deduced through analysis of the maximum wind power tracking conditions.The curve-fitting method was used to obtain the expression parameters of the optimal blade tip speed ratio when there were measurement errors.Then,the optimal blade tip speed ratio could be indirectly calculated.An example shows that the fitted data have high accuracy.This study provides a new curve-fitting method for calculating the optimal blade tip speed ratio of wind turbines.